Hairdryer filter



FIG. 1 is a perspective view of a hairdryer filter showing our new design;

FIG. 2 is a first side view thereof;

FIG. 3 is a side view of the opposite side of FIG. 2;

FIG. 4 is a second side view thereof;

FIG. 5 is a side view of the opposite side of FIG. 4;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM We claim the ornamental design for a hairdryer filter, as shown and described. 